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參數(shù)資料
| 型號： | M38C13E6HP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機 |
| 文件頁數(shù)： | 20/59頁 |
| 文件大?。?/td> | 1063K |
| 代理商： | M38C13E6HP |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C1 Group
20
Key Input Interrupt (Key-on Wake Up)
A Key-on wake up interrupt request is generated by applying
“
L
”
level voltage to any pin of port P3 that have been set to input
mode. In other words, it is generated when AND of input level
goes from
“
1
”
to
“
0
”
. An example of using a key input interrupt is
shown in Figure 17, where an interrupt request is generated by
pressing one of the keys consisted as an active-low key matrix
which inputs to ports P3
0
–
P3
3
.
Fig. 17 Connection example when using key input control register, key input interrupt and port P3 block diagram
P
l
a
o
t
r
t
h
P
3
0
c
Port P3
0
direction register =
“
0
”
Port P3
1
latch
Port P3
1
direction register =
“
0
”
Port P3
2
latch
Port P3
2
direction register =
“
0
”
P
l
a
o
t
r
t
h
P
3
3
c
Port P3
3
direction register =
“
0
”
P
l
a
o
t
r
t
h
P
3
4
c
Port P3
4
direction register =
“
1
”
P
3
0
i
n
p
u
t
P3
1
input
P
3
2
i
n
p
u
t
P
3
3
i
n
p
u
t
P
3
4
o
u
t
p
u
t
PULL register
Bit 3 =
“
1
”
Port P3
input read circuit
Port PXx
“
L
”
level output
K
e
y
i
n
p
u
t
i
n
t
e
r
r
u
p
t
r
e
q
u
e
s
t
P-channel transistor for pull-up
CMOS output buffer
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